<!-- https://docs.angularjs.org/guide/animations -->
<div id="animationTop">
  <label>
    <input id="checkbox" type="checkbox" ng-model="checked" style="float:left; margin-right:10px;">
    Click Me to toggle with animation
  </label>
  <div id="toggledNode" class="animate-if" ng-if="checked" style="clear:both;">
    I exist!
  </div>
</div>
